APs failing after buying new ones

[Tom Ribbens]

On a WLC 5508, which was already running fine, with APs of the 1042 and 1131 type, new access points (type 2602i) are added. Since then, the AP's often stop working. This happens with both the 1042 and 2602i types of AP. The 1131 APs have no problems.

When an AP malfunctions, its LED starts blinking green.

Any ideas what this could be?

[Rasika Nayanajith]

What software code run on 5508 ? Post "show sysinfo" output of your WLC.

Rasika

[Tom Ribbens]

(Cisco Controller) >show sysinfo
 
 Manufacturer's Name.............................. Cisco Systems Inc.
 Product Name..................................... Cisco Controller
 Product Version.................................. 7.5.102.0
 Bootloader Version............................... 1.0.1
 Field Recovery Image Version..................... 6.0.182.0
 Firmware Version................................. FPGA 1.3, Env 1.6, USB console 1.27
 Build Type....................................... DATA + WPS
 
 System Name...................................... BUG-WC-C1-006
 System Location.................................. C1 Genthof
 System Contact................................... Ken Callebaut
 System ObjectID.................................. 1.3.6.1.4.1.9.1.1069
 Redundancy Mode.................................. Disabled
 IP Address....................................... 192.50.12.6
 Last Reset....................................... Watchdog reset
 System Up Time................................... 42 days 14 hrs 37 mins 3 secs
 System Timezone Location......................... (GMT +1:00) Amsterdam, Berlin, Rome, Vienna
 System Stats Realtime Interval................... 5
 System Stats Normal Interval..................... 180
 
 Configured Country............................... BE  - Belgium
 Operating Environment............................ Commercial (0 to 40 C)
 
 --More-- or (q)uit
 Internal Temp Alarm Limits....................... 0 to 65 C
 Internal Temperature............................. +34 C
 External Temperature............................. +21 C
 Fan Status....................................... OK
 
 State of 802.11b Network......................... Enabled
 State of 802.11a Network......................... Enabled
 Number of WLANs.................................. 7
 Number of Active Clients......................... 69
 
 Burned-in MAC Address............................ 50:3D:E5:AE:87:E0
 Power Supply 1................................... Present, OK
 Power Supply 2................................... Absent
 Maximum number of APs supported.................. 50
 
 

[Rasika Nayanajith · Accepted solution]

Upgrade your WLC Field Upgrade Software (FUS) to 1.7 & see. Below describe the upgrade procedure.

http://www.cisco.com/en/US/docs/wireless/controller/release/notes/fus_rn_1_7_0_0.html

It is the recomended version of FUS for WLC code 7.4 onwards. Sometime these sort of AP behaviour (if that happen to multiple APs randomly) could cause by this.

This upgrade process usually takes around 30min & get enough outage window to do this upgrade.

WLC 7.5.x release note also highlighted this upgrade requirement  as well.

http://www.cisco.com/en/US/docs/wireless/controller/release/notes/crn75.html#wp976667

HTH

Rasika

*** Pls rate all useful responses ***

[Tom Ribbens]

Going to install the upgrade one of these days. I'll let you know the results.

[Tom Ribbens]

FUS installed. We are now monitoring the APs to see if they still fail.

[Rasika Nayanajith]

Hi Tom,

Did that FUS upgrade helps you to fix the issue ?

Rasika

[Tom Ribbens]

Yes it did! Thanks for reminding me to update it here. I was planning to, and then it became busy and I forgot.

[Rasika Nayanajith]

That's great Tom... Glad that fixed your issue.

Rasika

[Leo Laohoo]

Last Reset....................................... Watchdog reset

Ummmmm ... This does not look good.

[Scott Fella]

I would check the cabling and also maybe run a TDR test off the switch if it's a Cisco switch. Ethernet compared to Gigabit and cabling at times can be the issue. This also includes patch cables.

You also should look at the switch logs and port for errors. What is the uptime and join time for the AP's?

Sent from Cisco Technical Support iPhone App

[Leo Laohoo]

If you have a Cisco switch, you can do TDR (if it's supported).